NPK Board
About the NPK Board
NPK Board is an open source STM32 PCB design by collins-emasi, published on GitHub. It is a 4-layer board measuring 107.6 × 41 mm, with 104 components from 61 distinct parts.
Its main chip is the STM32WL55JCI7, from the STM32 family. Other key parts include the RT8059, MT3608, MAX3485, NX3L1T3157 and BGS13S4N9. By type, the board carries 61 capacitors, 15 inductors, 11 resistors, 8 ICs, 3 crystals and 3 connectors.
From the project
In this repository, I will be sharing some of the project I'm working on with KiCAD software.
Main components on the NPK Board
NPK Board bill of materials (BOM)
104 components, 61 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RT8059 | SOT-23-5 | U1 |
| 1 | ~ | SOT-23-5 | U2 |
| 1 | MT3608 | SOT-23-6 | U3 |
| 1 | STM32WL55JCI7 | ST_UFBGA-73_5x5mm_Layout9x9_P0.5mm | U4 |
| 1 | MAX3485 | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 2 | NX3L1T3157 | SOT-886 | U6, U7 |
| 1 | BGS13S4N9 | TSNP-9_3x3_1.2x1.2mm | U8 |
| 1 | 32.768KHz | Crystal_SMD_2012-2Pin_2.0x1.6mm_3D | Y2 |
| 2 | 32MHz | Crystal_SMD_2016-4Pin_2.0x1.6mm | Y3, Y4 |
| 1 | Battery Conn | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J1 |
| 1 | Screw_Terminal_01x04 | TerminalBlock_Phoenix_PT-1,5-4-3.5-H_1x04_P3.50mm_Horizontal | J2 |
| 1 | SMA | SMA CONNECTOR JACK | J3 |
| 1 | SW_MEC_5E | SW4-SMD-5.2X5.2X1.5MM | SW1 |
| 1 | ESDALC6V1-1U2 | D_SOD-523 | D1 |
| 1 | SK34 | D_0603_1608Metric | D2 |
| 1 | 600R@100MHz | L_0603_1608Metric | FB1 |
| 1 | 1400R@1GHz | L_0402_1005Metric | FB2 |
| 2 | 2u2 | L_Sunlord_MWSA0503S | L1, L3 |
| 1 | 15u | L_0805_2012Metric | L2 |
| 2 | 3n6 | L_0402_1005Metric | L4, L10 |
Show 41 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 8n7 | L_0402_1005Metric | L5, L9, L13 |
| 1 | 33n | L_0402_1005Metric | L6 |
| 1 | 47n | L_0402_1005Metric | L7 |
| 1 | 3n | L_0402_1005Metric | L8 |
| 1 | 3n3 | L_0402_1005Metric | L11 |
| 1 | 11n | L_0402_1005Metric | L12 |
| 3 | 4u7 | C_0603_1608Metric | C1, C9, C16 |
| 9 | 100n | C_0402_1005Metric | C2, C10, C11, C12, C13, C14, C15, C18 +1 |
| 1 | 3.3p | C_0402_1005Metric | C3 |
| 5 | 33p | C_0402_1005Metric | C4, C34, C35, C52, C59 |
| 1 | 68p | C_1206_3216Metric | C5 |
| 2 | 10u | C_1206_3216Metric | C6, C21 |
| 1 | 4u7 | C_1206_3216Metric | C7 |
| 4 | 100n | C_1206_3216Metric | C8, C22, C24, C29 |
| 1 | 470n | C_0603_1608Metric | C17 |
| 1 | 10u | C_0805_2012Metric | C19 |
| 1 | 100n | C_0805_2012Metric | C20 |
| 1 | 10p | C_0402_1005Metric | C23 |
| 2 | 47u | C_1206_3216Metric | C25, C26 |
| 1 | 220n | C_0402_1005Metric | C27 |
| 2 | 5.1p | C_0402_1005Metric | C28, C30 |
| 2 | 6.8p | C_0402_1005Metric | C31, C32 |
| 1 | 47p | C_0402_1005Metric | C36 |
| 4 | 1p2 | C_0402_1005Metric | C37, C43, C44, C45 |
| 3 | 1n | C_0402_1005Metric | C38, C40, C41 |
| 1 | 2p2 | C_0402_1005Metric | C39 |
| 4 | 68p | C_0402_1005Metric | C42, C47, C49, C51 |
| 2 | 5p6 | C_0402_1005Metric | C46, C54 |
| 1 | 47n | C_0402_1005Metric | C48 |
| 2 | 2p7 | C_0402_1005Metric | C50, C58 |
| 1 | 1p3 | C_0402_1005Metric | C53 |
| 3 | 3p3 | C_0402_1005Metric | C55, C60, C61 |
| 1 | 3p6 | C_0402_1005Metric | C56 |
| 1 | 1p | C_0402_1005Metric | C57 |
| 1 | 68k | R_0603_1608Metric | R1 |
| 1 | 15k | R_0603_1608Metric | R2 |
| 1 | 6k8 | R_0603_1608Metric | R3 |
| 2 | 200k | R_0603_1608Metric | R4, R6 |
| 2 | 10k | R_0603_1608Metric | R5, R7 |
| 1 | 510 | R_0603_1608Metric | R8 |
| 3 | 100R | R_0402_1005Metric | R9, R10, R11 |
NPK Board design files
The KiCad project lives in the collins-emasi/KiCAD-PROJECTS-PCB repository on GitHub; these links point at the commit this page was built from.
- LayoutNPK_Board/NPK_Board.kicad_pcb
- SchematicNPK_Board/NPK_Board.kicad_sch
NPK Board: common questions
What microcontroller does the NPK Board use?
The NPK Board is built around the STM32WL55JCI7, from the STM32 family.
How big is the NPK Board?
The NPK Board measures 107.6 × 41 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the NPK Board?
104 components, from 61 distinct parts. The full bill of materials is listed on this page.
Where can I download the NPK Board design files?
From the collins-emasi/KiCAD-PROJECTS-PCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the NPK Board design in my own project?
The repository has no license, so all rights stay with collins-emasi. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the NPK Board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
More boards in KiCAD-PROJECTS-PCB
STM32LoST 9632 Board
56 × 114 mm97 parts4LNo license1
STM32NPK Board x RFM96
57 × 95 mm96 parts4LNo license1
STM32LoRa STM32 Board
51.6 × 56 mm81 parts4LNo license1
STM32STM32 Example 1 board
54.7 × 42 mm46 parts4LNo license1
STLoRa Carrier Board
96 × 45.7 mm22 parts4LNo license1
Traffic lights
26.7 × 49 mm7 parts2LNo license1
Similar boards
STM32LumenPnP Motherboard
opulo-inc
149 × 95 mm296 parts4LCC-BY-SA-4.03.7k
STM32AxxSolder
AxxAxx
39 × 82.5 mm122 parts2LGPL-3.01.7k
STM32LibreVNA
jankae
122 × 98 mm592 parts6LGPL-3.01.6k
STM32AIOC
skuep
21 × 31.5 mm47 parts2LMIT1.4k
STM32Ferris
pierrechevalier83
208.8 × 86.8 mm102 parts2LSHL-2.11.3k
STM32176 pin board
rusefi
61.8 × 73.2 mm76 parts2LGPL-3.01.2k